IOTA/IOTA-ES occultation update for (2505) Hebei / TYC 6195-01766-1 event on 2024 Feb 02, 02:39 UT Visible from Summary ------- On 2024 Feb 02 UT, the 23.4800857046378 km diameter asteroid (2505) Hebei will occult a 8.4 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.80 mag to 17.22 mag (the magnitude of the asteroid) for at most 0.820 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 100 * date and approx. time of event: 2024 Feb 02, 02:35 - 2024 Feb 02, 02:42 * geocentric midpoint of event [JD]: 2460342.61044529 * magnitude of target star: 8.42 * magnitude drop [mag]: 8.80 * estimated maximum duration [s]: 0.820 * Moon: 58 % sunlit, 28° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 27 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.001", 104°) * approx speed of asteroid's shadow [km/s]: 28.9437 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6195-01766-1 by 2505 Hebei on 2024 Feb 2 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude - 25 0 0 -14 35 40 2 35 47.4 1 110 -57 -14 43 27 -14 27 54 -14 44 50 -14 26 31 .... - 24 0 0 -14 58 11 2 35 47.5 2 110 -56 -15 5 59 -14 50 24 -15 7 22 -14 49 1 0.46 - 23 0 0 -15 21 0 2 35 47.7 3 110 -55 -15 28 48 -15 13 12 -15 30 12 -15 11 49 0.48 - 22 0 0 -15 44 6 2 35 48.0 4 110 -55 -15 51 55 -15 36 17 -15 53 19 -15 34 54 0.49 - 21 0 0 -16 7 29 2 35 48.3 5 109 -54 -16 15 19 -15 59 39 -16 16 43 -15 58 15 0.50 - 20 0 0 -16 31 8 2 35 48.8 6 109 -53 -16 38 59 -16 23 17 -16 40 23 -16 21 53 0.51 - 19 0 0 -16 55 3 2 35 49.3 7 109 -52 -17 2 55 -16 47 11 -17 4 19 -16 45 47 0.51 - 18 0 0 -17 19 12 2 35 49.9 8 108 -52 -17 27 5 -17 11 20 -17 28 30 -17 9 56 0.51 - 17 0 0 -17 43 37 2 35 50.6 9 108 -51 -17 51 31 -17 35 44 -17 52 55 -17 34 19 0.51 - 16 0 0 -18 8 15 2 35 51.3 10 108 -50 -18 16 10 -18 0 21 -18 17 34 -17 58 57 0.51 - 15 0 0 -18 33 7 2 35 52.2 11 108 -49 -18 41 2 -18 25 12 -18 42 27 -18 23 47 0.52 - 14 0 0 -18 58 11 2 35 53.1 12 107 -48 -19 6 7 -18 50 15 -19 7 32 -18 48 51 0.52 - 13 0 0 -19 23 27 2 35 54.1 13 107 -47 -19 31 24 -19 15 31 -19 32 49 -19 14 6 0.52 - 12 0 0 -19 48 55 2 35 55.2 14 106 -47 -19 56 53 -19 40 57 -19 58 18 -19 39 32 0.52 - 11 0 0 -20 14 33 2 35 56.3 15 106 -46 -20 22 32 -20 6 35 -20 23 57 -20 5 10 0.52 - 10 0 0 -20 40 21 2 35 57.6 16 106 -45 -20 48 20 -20 32 22 -20 49 46 -20 30 57 0.52 - 9 0 0 -21 6 19 2 35 58.9 17 105 -44 -21 14 19 -20 58 19 -21 15 44 -20 56 54 0.52 - 8 0 0 -21 32 25 2 36 0.3 18 105 -43 -21 40 25 -21 24 24 -21 41 51 -21 22 59 0.52 - 7 0 0 -21 58 38 2 36 1.7 19 104 -42 -22 6 40 -21 50 38 -22 8 6 -21 49 12 0.52 - 6 0 0 -22 24 59 2 36 3.3 20 104 -41 -22 33 1 -22 16 58 -22 34 27 -22 15 32 0.52 - 5 0 0 -22 51 27 2 36 4.9 21 104 -40 -22 59 29 -22 43 25 -23 0 55 -22 41 59 0.52 - 4 0 0 -23 18 0 2 36 6.5 22 103 -39 -23 26 3 -23 9 57 -23 27 29 -23 8 31 0.52 - 3 0 0 -23 44 37 2 36 8.3 23 103 -38 -23 52 41 -23 36 34 -23 54 7 -23 35 8 0.52 - 2 0 0 -24 11 19 2 36 10.1 24 102 -37 -24 19 24 -24 3 16 -24 20 50 -24 1 50 0.52 - 1 0 0 -24 38 4 2 36 11.9 25 101 -36 -24 46 9 -24 30 0 -24 47 36 -24 28 34 0.52 - 0 0 0 -25 4 52 2 36 13.9 26 101 -36 -25 12 58 -24 56 48 -25 14 24 -24 55 22 0.52 1 0 0 -25 31 42 2 36 15.9 27 100 -35 -25 39 48 -25 23 37 -25 41 14 -25 22 11 0.52 2 0 0 -25 58 33 2 36 17.9 28 100 -34 -26 6 39 -25 50 27 -26 8 5 -25 49 1 0.52 3 0 0 -26 25 24 2 36 20.1 29 99 -33 -26 33 30 -26 17 18 -26 34 57 -26 15 52 0.52 4 0 0 -26 52 14 2 36 22.2 30 99 -32 -27 0 21 -26 44 8 -27 1 48 -26 42 42 0.52 5 0 0 -27 19 4 2 36 24.5 31 98 -31 -27 27 11 -27 10 57 -27 28 37 -27 9 31 0.52 6 0 0 -27 45 51 2 36 26.7 32 97 -30 -27 53 58 -27 37 45 -27 55 25 -27 36 18 0.52 7 0 0 -28 12 36 2 36 29.1 33 97 -29 -28 20 43 -28 4 29 -28 22 10 -28 3 3 0.52 8 0 0 -28 39 17 2 36 31.5 34 96 -28 -28 47 24 -28 31 10 -28 48 51 -28 29 44 0.52 9 0 0 -29 5 54 2 36 33.9 35 95 -27 -29 14 1 -28 57 47 -29 15 28 -28 56 20 0.52 10 0 0 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18 53 -42 0 25 0.55 160 0 0 -41 50 57 2 42 13.2 12 253 61 -41 58 48 -41 43 7 -42 0 12 -41 41 43 0.56 161 0 0 -41 31 57 2 42 13.9 11 253 61 -41 39 49 -41 24 6 -41 41 13 -41 22 42 0.56 162 0 0 -41 12 38 2 42 14.5 10 252 61 -41 20 31 -41 4 46 -41 21 55 -41 3 22 0.56 163 0 0 -40 53 1 2 42 15.1 9 251 60 -41 0 54 -40 45 7 -41 2 19 -40 43 43 0.56 164 0 0 -40 33 5 2 42 15.6 8 251 60 -40 40 59 -40 25 11 -40 42 24 -40 23 46 0.57 165 0 0 -40 12 51 2 42 16.1 7 250 60 -40 20 46 -40 4 56 -40 22 11 -40 3 31 0.57 166 0 0 -39 52 18 2 42 16.6 7 249 60 -40 0 15 -39 44 23 -40 1 39 -39 42 58 0.58 167 0 0 -39 31 28 2 42 17.0 6 249 59 -39 39 25 -39 23 32 -39 40 50 -39 22 7 0.59 168 0 0 -39 10 21 2 42 17.3 5 248 59 -39 18 19 -39 2 24 -39 19 44 -39 0 59 0.60 169 0 0 -38 48 56 2 42 17.6 4 248 58 -38 56 55 -38 40 59 -38 58 20 -38 39 34 0.62 170 0 0 -38 27 15 2 42 17.9 3 247 58 -38 35 14 -38 19 16 -38 36 39 -38 17 51 0.65 171 0 0 -38 5 17 2 42 18.1 2 246 58 -38 13 17 -37 57 18 -38 14 42 -37 55 52 0.69 172 0 0 -37 43 3 2 42 18.2 1 246 57 -37 51 3 -37 35 3 -37 52 29 -37 33 37 0.80 173 0 0 -37 20 32 2 42 18.3 1 245 57 -37 28 33 -37 12 32 -37 29 59 -37 11 6 1.25 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 13.1 Data for the target star ------------------------ * name: TYC 6195-01766-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 59 06.9365 DE: -19 56 07.175 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 59 06.9371 DE: -19 56 07.177 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.4 * B mag [mag]: 8.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2505) Hebei asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.88050 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Apr 24 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.021", 0.001", 103.76° remarks: * orbital elements for (2505)Hebei : Mean anomaly = 328.3268465875 deg Arg. of pericenter = 206.7312689092 deg Long. of node = 59.2283899289 deg Inclination = 2.0772526261 deg Eccentricity = 0.1720234650 Semimajor axis = 3.1459293630 AU Perihelion dist = 2.6047556934 AU Mag: H = 11.75, G = 0.15 Epoch of elements : MJD 60342.11044534 TDT (2024 Feb 02.1104) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,0.82,2024,2,2,2.650687,-0.100058,-0.449192,15.961432,-3.481129,-0.005445,0.001123,-0.000001,0.000000 68.5645,-20.0040,143.63,-16.99,False TYC 6195-01766-1,15.98526012,-19.9353263,8.63,8.42,8.31,0.1,0,,16.00839421,-20.0039615,8.80,8.46,0,0,0 2505,Hebei,17.22,23.689,2.8805,0,0,3.458,-10.63,,1.2,0 0,328.3073,2024,2,2,206.7313,59.2284,2.0773,0.17202,3.14593,2.60476,11.75,5.0,0.15 1.089,0.0207,0.0009,104,0.0010,Known errors,1.25,0,-1,-1 20240202_1766-1,60138.15 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org